<template>
    <div class="sidebar">
        <el-menu class="sidebar-el-menu" :default-active="onRoutes" :collapse="collapse" background-color="#324157"
                 text-color="#bfcbd9" active-text-color="#20a0ff" unique-opened router>
            <template v-for="item in items">
                <template v-if="item.subs">
                    <el-submenu :index="item.index" :key="item.index">
                        <template slot="title">
                            <i :class="item.icon"></i><span slot="title">{{ item.title }}</span>
                        </template>
                        <template v-for="subItem in item.subs">
                            <el-submenu v-if="subItem.subs" :index="subItem.index" :key="subItem.index">
                                <template slot="title">{{ subItem.title }}</template>
                                <el-menu-item v-for="(threeItem,i) in subItem.subs" :key="i" :index="threeItem.index">
                                    {{ threeItem.title }}
                                </el-menu-item>
                            </el-submenu>
                            <el-menu-item v-else :index="subItem.index" :key="subItem.index">
                                {{ subItem.title }}
                            </el-menu-item>
                        </template>
                    </el-submenu>
                </template>
                <template v-else>
                    <el-menu-item :index="item.index" :key="item.index">
                        <i :class="item.icon"></i><span slot="title">{{ item.title }}</span>
                    </el-menu-item>
                </template>
            </template>
        </el-menu>
    </div>
</template>

<script>
    import bus from '../common/bus';

    export default {
        data() {
            return {
                collapse: false,
                items: [
                    {
                        icon: 'el-icon-lx-home',
                        index: '/index',
                        title: '系统首页'
                    },
                    {
                        icon: 'el-icon-lx-cascades',
                        index: '/data/cabinet',
                        title: '数据中心',
                        subs: [
                            {
                                index: '/data/cabinet',
                                title: '动力系统'
                            },
                            {
                                index: '/report/index',
                                title: '报表中心'
                            },
                            // {
                            //     index: '/data/branch_circuit',
                            //     title: '支路管理'
                            // }
                        ]
                    },
                    // {
                    //     icon: 'el-icon-lx-copy',
                    //     index: '/report/index',
                    //     title: '报表中心'
                    // },
                    {
                        icon: 'el-icon-s-order',
                        index: '/task',
                        title: '任务中心',
                        subs: [
                            {
                                index: '/task/scheduler',
                                title: '任务列表'
                            },
                            {
                                index: '/task/history',
                                title: '任务历史'
                            },
                            {
                                index: '/task/run_history',
                                title: '运行历史'
                            },
                        ]
                    },

                    {
                        icon: 'el-icon-user-solid',
                        index: '/user/list',
                        title: '用户管理',
                        // subs: [
                        //     {
                        //         index: '/user/create',
                        //         title: '添加用户'
                        //     },
                        //     {
                        //         index: '/user/list',
                        //         title: '用户列表'
                        //     }
                        // ]
                    },

                ]
            }
        },
        computed: {
            onRoutes() {
                // console.log(this.$route.path.replace('/',''))
                return this.$route.path;
            }
        },
        created() {
            // 通过 Event Bus 进行组件间通信，来折叠侧边栏
            bus.$on('collapse', msg => {
                this.collapse = msg;
            })
        }
    }
</script>

<style scoped>
    .sidebar {
        display: block;
        position: absolute;
        left: 0;
        top: 70px;
        bottom: 0;
        overflow-y: scroll;
    }

    .sidebar::-webkit-scrollbar {
        width: 0;
    }

    .sidebar-el-menu:not(.el-menu--collapse) {
        width: 250px;
    }

    .sidebar > ul {
        height: 100%;
    }
</style>
